Kunai

A kunai is an ancient Japanese kind of gardening tool or trowel. Two variations are the short kunai and the big kunai It is a good example of a very basic tool which, in the hands of a martial arts expert, could be used as a multi-functional weapon.

The kunai was conventionally wrought of ranged from 20 cm to 60 cm, with the average at 40 cm. The kunai was used by common folk as multi-purpose gardening tools and by workers of stone and masonry. The kunai is not a knife, but something more akin to a crowbar. The blade was soft iron and unsharpened because the edges were used to smash plaster and wood, to dig holes and to pry. Normally only the tip would have been sharpened. The uses to which a kunai was put would have destroyed any heat-treated and sharpened tool like a knife.

Kunai normally had a leaf-shaped blade and a handle with a ring on the pommel for attaching a rope. This would allow the kunai's handle to be wrapped to act as a grip, or when used as a weapon; to be strapped to a stick as an expedient spear, to be tied to the body for concealment, or to use as an anchor or piton.

Contrary to popular belief, they were not designed to be used primarily as throwing weapons, though they can be thrown and cause damage. Instead, they are a farming implement.